As the population ages, retirement reforms and immigration policies become crucial in addressing the challenges of overpopulation.

Of all the doomsday predictions about our planetary future from the 1960s and 1970s, perhaps none was so wrong as the fear about overpopulation. The reality has proven to be just as alarming, if for the opposite reason: In every region of the world except Africa, population levels have begun to level off due to declining birthrates.